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KatRina [158]
3 years ago
15

A 10-kg rock falls from a height of 8-m above the ground. What is the kinetic energy of the rock just before it hits the ground?

Physics
1 answer:
pishuonlain [190]3 years ago
3 0

Answer: 800

Explanation:

1/2 x m x v^2 = m x g x h

KE = 10 x 10 x 8

KE= 800

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Answer:

B) boiling point

Explanation:

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But the volume does not change. The limited amount of space between the particles means that the liquid has only very limited compressibility.

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What best describes the states of nonmetals when they are at room temperature? Most nonmetals are gaseous, but some are liquid o
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What might common French citizens have liked and disliked about the metric system when it was adopted
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3 years ago
If the charges attracting each other in the preceding problem have equal magnitudes,show that the magnitude of each charge is 2.
Schach [20]

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The magnitude of each charge is 2.82\times10^{-6}\ C

Explanation:

Suppose the two point charges are separated by 6 cm. The attractive force between them is 20 N.

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F=\dfrac{kq^2}{r^2}

Where, q = charge

r = separation

Put the value into the formula

20=\dfrac{9\times10^{9}\times q^2}{(6\times10^{-2})^2}

q^2=\dfrac{(6\times 10^{-2})^2\times20}{9\times10^{9}}

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q=2.82\times10^{-6}\ C

Hence, The magnitude of each charge is 2.82\times10^{-6}\ C

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